Tool-fastening



' R. 'DOUGLAs (No Model.)A

TOOL 'FASTBNING.

Vlmmutefl Aug. 8, 1893.v

/N VEN T03 W/ TNE SSE S: ,WC/@62nd,

A TTOHNEYS.

UNIT-ED STATES PATENT OFFICE.

ROBERT DOUGLAS, OF FALL RIVER, MASSAOHUSETTS.

TOOL-FASTENING.

SPECIFICATION forming part of Letters Patent No. 502,708, dated August8, 1893. Application filed June 9, 1892. rSerial No. 43 6,040. (Nomodel.)

To a/ZZ whom it may concern.-

Beit known that I, ROBERT DOUGLAS, of Fall River, in the county oflristol and State of Massachusetts, have invented a new and ImprovedTool-Fastening, of which the following is a full, clear, and exactdescription.

The object of my invention is to provide an improvement in means forsecuring files and certain other tools to wooden handles. Nuts orscrew-threaded plugs havebeen applied to the tangs of files and similartools for this purpose, and so have disks of horn, rubber or otherelastic material. The nut `or screw threaded plugs could not, however,be driven into the longitudinal bore formed in a handle and the elasticdisks afforded no secure fastening-since they allowed the tool a certainlateral play -besides being unable to resist strong longitudinal tensionon the handles. To overcome these and other dedefects of such fasteningdevices,I have conceived and practically applied the device hereinafterdescribed and shown in accompanying drawings, in which- Figure l is asectional side elevation ofthe improvement as applied. Fig. 2 is asectional side elevation of the collar. Fig. 3 is a sectional sideelevation of a modified form of the improvement; and Fig-4 is asectional side elevation of the collar for the modified form.

The tapering shank A of the toolB carries on its end a hard metal collarO, fastened thereto by riveting the extreme outer end of the shank afterthe collar is in place, as will be readily understood by reference toFig. 1.

The bore of the collar C corresponds to the shape of the shank so thatwhen the shank is riveted, the collar is securely held in place toprevent it from slipping up or down on the shank and also prevent itfrom turning. The collar Ois adapted to be driven with the shank A intoa recess D, formed in the handle E, the said recess being cylindrical,and about of the same diameter as the collar O, so that when the latteris driven into the recess it its snugly therein.

If desired, an annular recess F, may be formed exteriorly in the collarO, as shown in Figs. 3 and 4, so that the wood of the handle may expandinto the said annular recess after 5o the collar O has been driven homein the handle, so as to prevent displacement of the col-v lar in thehandle. In order to conveniently drive the collar O into position in thehandle E, the ends of the collar are slightly rounded olf, as will bereadily understood by reference to the drawings.

The recess D is of sufficient depth to admit the entire length of theshank A of the tool,

the outer end of the handle being bound by 6o the usual ferrule, asshown in the drawings. The outer end of the recess D is engaged by theupper end of the tapering shank A so that the latteris securely held inplace in the handle and turning of the tool B or disengagement from thehandle is prevented.

i The fastening device O is cheap and durable and forms a securefastening which is easily applied. It may however be removed, in case ofnecessity, by application of a due degree 7o of force. v

Having thus fully described my invention,

1 claim as new and desire to secure by Letters Patentl. The combinationwith the tool having a tapering shank, ofthe cylindrical hard metalcollar C having smooth tapering bore fitting the lower end of the shankand provided with rounded edges; the extremity ot' the shank being upsetor riveted over the. lower end of 8o the collar to secure the saidcollar permanently in place, substantially as set forth.

2. The combination with the tool handle having a bore D, of the toolhaving a flat tapering shank A the upper wide portion of which fits theupper end of the bore to prevent turning, and the cylindrical hard metalcollar C having a tapering bore receiving the lower end of the tang androunded at its upper and lower edges to facilitate entrance and 9o exitof the collar into and out'of ythe bore; the lower end of the shankbeing upset or riveted over the collar to permanently secure it inplace, substantially as s'et forth.

ROBERT DOUGLAS. Witnesses:

DAVID I). KEEEE, CHESTER W. GREENE, 2d.

